It is said that bitcoin will destroy the fiat system but i believe that if this happens the world will change completly because banks and a lot of things will go out of market.
I can't imagine how bitcoin could destroy the fiat system, it can't be forever.
Bitcoin will always go through the way side by side with fiat system due to every country have their own currency as national identity.
Government and banks will adopt blockchain technology to make it happen, let see how it works in the future.
In 2022, six years later is a short period for bitcoin used by almost everyone, just about 15-20% of world population I thought.
Because not everyone trust virtual money that can not be touched and people still love to using fiat money.